Of all the humans tested so far…

Of all the humans tested so far, everyone has contained the same DNA from 1 of at least 2 ancestors. Mitochondrial DNA being traced back matrilineally to a specific “mT-Eve,” and a Y-chromosome being traced back patrilineally to a specific “Y-chromosomal Adam.” We are not descended from a singular couple, but rather we are all seemingly descended from singular ancestors that may have lived hundreds of thousands of years apart.

If we assume that only 5% of all the humans that will ever be born…

If we assume that only 5% of all the humans that will ever be born have already been born (about 60 billion), then we can predict that 1.2 trillion humans will ever be born. Assuming that the world population stabilizes at 10 billion at a life expectancy of 80 years, it can be estimated that the remaining 1.14 trillion humans that will ever be born will be born in 9120 years. This is the Doomsday Argument.